Going out to my car this afternoon after work. I turn on the car, turn on the radio......... No sound. The weird part is the volume controls stop working (HU & Steering wheel control) 5 sec after the HU is started up. The station tuning knob won't adjust stations. But the station presets, CD/FM/AM/TAPE all work.When I turn on the stereo I hear the little pop sound that my system makes when you turn it on, and when you turn it off..........Just curious if there's anythin I should try before I take it into my shop on Monday?